// Filename: stateMunger.h
// Created by:  drose (04May05)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) Carnegie Mellon University.  All rights reserved.
//
// All use of this software is subject to the terms of the revised BSD
// license.  You should have received a copy of this license along
// with this source code in a file named "LICENSE."
//
////////////////////////////////////////////////////////////////////

#ifndef STATEMUNGER_H
#define STATEMUNGER_H

#include "pandabase.h"
#include "geomMunger.h"
#include "renderState.h"
#include "weakKeyHashMap.h"

////////////////////////////////////////////////////////////////////
//       Class : StateMunger
// Description : This is just a simple derivative of GeomMunger that
//               adds the ability to munge states.  That functionality
//               can't be declared in the base class, since it doesn't
//               really know about RenderState.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDA_PGRAPH StateMunger : public GeomMunger {
public:
  INLINE StateMunger(GraphicsStateGuardianBase *gsg);
  virtual ~StateMunger();
  CPT(RenderState) munge_state(const RenderState *state);

protected:
  virtual CPT(RenderState) munge_state_impl(const RenderState *state);

  typedef WeakKeyHashMap<RenderState, WCPT(RenderState) > StateMap;
  StateMap _state_map;

public:
  static TypeHandle get_class_type() {
    return _type_handle;
  }
  static void init_type() {
    GeomMunger::init_type();
    register_type(_type_handle, "StateMunger",
                  GeomMunger::get_class_type());
  }
  virtual TypeHandle get_type() const {
    return get_class_type();
  }
  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}

private:
  static TypeHandle _type_handle;
};

#include "stateMunger.I"

#endif

